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Why the Gold Line Opening Was Delayed
The Gold Line in Little Tokyo | Photo by STERLINGDAVISPHOTO via the LAist Featured Photos pool on Flickr
A Neon Tommy investigation has revealed why the Gold Line's opening was delayed, despite being ahead of schedule in construction. Basically, electrical shorts caused trains to "unpredictably switch tracks." The USC internet news site was given the run around by Metro, but it eventually obtained 40 pages of documents that led to their recent story. In part, here's what happened:
First mention of the electrical leakage issue came in an Aug. 10 update from Metro's CEO Art Leahy to the board of directors. The problem occurred at three different track crossovers -- a pair of switches connects two parallel rail tracks, allowing one train on a track to cross over to another track. The intersections : 1st Street and Clarence Avenue; 3rd Street and Ditman Avenue; and 3rd Street and Woods Avenue. Testing showed that paint containing iron oxide was causing the electrical shorts. Two problems made it worse. First, the contractor, Eastside Light Rail, placed wires within colored concrete slabs.
Regular concrete is a mixture of cement, gravel, sand and water, and is gray. Color pigments, known as iron oxide, are then added. Iron oxide, which is highly conductive, created the light tan color that Metro desired for the concrete, and probably caused the area around the wiring to be highly conductive as well. The second problem turned up when tests revealed a lack of insulation around the wires within those colored concrete slabs. That insulation generally ensures that whatever is outside of the wires does not conduct electricity with the actual wires themselves, causing a short circuit.
Because there was improper insulation, then, short circuits did in fact occur.
Southern California's Snow-Capped Mountains Are Beautiful. Here's Where To Maximize The View (And Snap A Great Picture)It's been many, many years since we saw this much snow in our mountains. Going up there right now isn't safe, but here are some places where you can enjoy the view and snap a pic.
April Valentine died at Centinela Hospital. Her daughter was born by emergency C-section. She'd gone into the pregnancy with a plan, knowing Black mothers like herself were at higher risk.
A look at years past when snows creeped into our citified neighborhoods, away from the mountains and foothills.
In the face of a drier future, that iconic piece of Americana is on its way out in Southern California.
Another Missing Hiker Has Been Found Dead In San Gabriels As Search For Actor Julian Sands ContinuesBob Gregory, 62, went missing the same day as Sands. His body was recovered near Mount Islip.